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Merge "Reserve space in pthread structures for future extensibility."

This commit is contained in:
Calin Juravle 2014-04-24 11:35:36 +00:00 committed by Gerrit Code Review
parent ae77f74bcf cf83fd77ca
commit 477d14b092
1 changed files with 27 additions and 12 deletions
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25
libc/include/pthread.h
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@ -35,17 +35,26 @@
#include <limits.h>
#include <sys/types.h>
#ifdef __LP64__
#define __RESERVED_INITIALIZER , {0}
#else
#define __RESERVED_INITIALIZER
#endif
typedef struct {
int volatile value;
#ifdef __LP64__
char __reserved[36];
#endif
} pthread_mutex_t;
#define __PTHREAD_MUTEX_INIT_VALUE 0
#define __PTHREAD_RECURSIVE_MUTEX_INIT_VALUE 0x4000
#define __PTHREAD_ERRORCHECK_MUTEX_INIT_VALUE 0x8000
#define PTHREAD_MUTEX_INITIALIZER {__PTHREAD_MUTEX_INIT_VALUE}
#define PTHREAD_RECURSIVE_MUTEX_INITIALIZER {__PTHREAD_RECURSIVE_MUTEX_INIT_VALUE}
#define PTHREAD_ERRORCHECK_MUTEX_INITIALIZER {__PTHREAD_ERRORCHECK_MUTEX_INIT_VALUE}
#define PTHREAD_MUTEX_INITIALIZER {__PTHREAD_MUTEX_INIT_VALUE __RESERVED_INITIALIZER}
#define PTHREAD_RECURSIVE_MUTEX_INITIALIZER {__PTHREAD_RECURSIVE_MUTEX_INIT_VALUE __RESERVED_INITIALIZER}
#define PTHREAD_ERRORCHECK_MUTEX_INITIALIZER {__PTHREAD_ERRORCHECK_MUTEX_INIT_VALUE __RESERVED_INITIALIZER}
enum {
PTHREAD_MUTEX_NORMAL = 0,
@ -60,9 +69,12 @@ enum {
typedef struct {
int volatile value;
#ifdef __LP64__
char __reserved[44];
#endif
} pthread_cond_t;
#define PTHREAD_COND_INITIALIZER {0}
#define PTHREAD_COND_INITIALIZER {0 __RESERVED_INITIALIZER}
typedef struct {
uint32_t flags;
@ -71,6 +83,9 @@ typedef struct {
size_t guard_size;
int32_t sched_policy;
int32_t sched_priority;
#ifdef __LP64__
char __reserved[16];
#endif
} pthread_attr_t;
typedef long pthread_mutexattr_t;
@ -85,7 +100,7 @@ typedef struct {
int writerThreadId;
int pendingReaders;
int pendingWriters;
void* reserved[4]; /* for future extensibility */
void* __reserved[4];
} pthread_rwlock_t;
#define PTHREAD_RWLOCK_INITIALIZER { PTHREAD_MUTEX_INITIALIZER, PTHREAD_COND_INITIALIZER, 0, 0, 0, 0, { NULL, NULL, NULL, NULL } }